Hello All
I just wanted to rewrite the above post
Galaxy Wars: M81 versus M82
antwrp.gsfc.nasa.gov/apod/ap080325.html
This is a fanatstic image
M8 as a spiral and M82 as an irregular galaxy. Both at different phases of evolution.
Basic Galaxy Properties by Type
www.astronomynook.com/galaxy_types.htm
The Hubble Tuning Fork
cas.sdss.org/dr6/en/proj/basic/galaxies/tuningfork.asp
<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">Quote:
Hubble believed that galaxies started at the left end of the tuning fork when they were young, and moved toward the right as they aged. Therefore, he called elliptical galaxies "early galaxies" and spiral galaxies "late galaxies".<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
I partly agree with hubble
and yet
<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">Quote:
We now know he was mistaken in this belief. Spiral galaxies have a great deal of rotation and elliptical galaxies do not. There is no way an elliptical galaxy could spontaneously begin rotating, so elliptical galaxies cannot turn into spiral galaxies. Although Hubble was wrong about his theory of galaxy evolution, the confusing names have stuck: today, elliptical galaxies are still referred to as early galaxies and spirals as late galaxies. <hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
I partly agree with the above statement.
When you put the both theories together you have a cyclic event.
Elliptical to spiral to irregular to ellipticl to spiral to irregular. This cyclic event keeps on going and is effected by other colliding galaxies.
One important point is that the so called black hole activity is directly related to the shape of the galaxy.
So!!!! M82 being an irregular galaxy has a very active black hole with jets ejecting matter at 90deg to the disc. In time this will transform the galaxy into an elliptical galaxy such as M87.
seds.org/messier/m/m087.html
which has a very active black hole
chandra.harvard.edu/photo/2001/0134/
chandra.harvard.edu/photo/2006/m87/
apod.nasa.gov/apod/ap950913.html
Smile and live another day
